两种热雾剂防治橡胶六点始叶螨药效试验
2014-11-24王明李四有徐扬川
王明+李四有+徐扬川
摘 要 使用15 %哒·阿维热雾剂和15 %克螨特热雾剂2种药剂进行防治橡胶六点始叶螨的药效试验结果表明:施药3 d后,克螨特热雾剂防效为76.68 %,哒·阿维热雾剂防效为89.33 %,处理间差异显著,哒·阿维热雾剂的速效性优于克螨特热雾剂;施药后7 d后,克螨特热雾剂防效为83.43 %,哒·阿维热雾剂的防效为87.62 %,处理间差异不显著;药后15 d,哒·阿维热雾剂还保持在85 %以上,而克螨特热雾剂的防效降至63.35 %,哒·阿维热雾剂的持效期显著优于克螨特热雾剂。
关键词 橡胶树 ;六点始叶螨 ;药效试验 ;热雾剂
中图分类号 S763.7
Control Effect of Two Hot Fogging Agents on Eotetranychus sexmaculatus
WANG Ming LI Siyou XV Yangchuan
(Wushi Branch of Hainan Rubber Group, Qongzhong, Hainan 572911)
Abstract The efficacy trials of two hot fogging concentrate showed that the mite population was respectively reduced 76.68% and 89.33% on the third day after treatment of 15% propargite and 15% abamectin, obvious difference between the two treatments. Abamectin better than propargite; The mite population was respectively reduced 83.43% and 87.62% on the seventh day after treatment of 15% propargite and 15% Abamectin, no significant difference between the two treatments. On the fifteenth day after treatment, the mite population was reduced at 85% or more by 15% Abamectin, but the mite population was reduced at 63.35% or less by 15% propargite. The former is more effective than the latter.
Key words Hevea brasiliensis ;Eoteranychus sexmaculatus ;efficacy trials ;hot fogging concentrate
橡胶六点始叶螨(Eoteranychus sexmaculatus)是橡胶树的主要害螨,一年可发生23代,平均每代历期19.2-55.6 d(世代重叠),可致橡胶树叶片发黄脱落,大量发生时可造成枝条枯死,严重影响橡胶产量[1-4]。近年来,橡胶六点始叶螨在海胶集团乌石分公司胶林由偶发性次要害虫上升为常发性主要害虫,面积由原来的几百公顷上升到现在的近5 000 hm2,每年因该虫为害造成的干胶损失约60 t,造成经济损失120万元(按20 000元/t计算)。
几年来,海胶集团乌石分公司对橡胶六点始叶螨的防治主要采用哒螨灵烟雾剂防治,防治效果较为理想,但药效持续时间短,喷药次数多。2012年公司对主要防治六点始叶螨的热雾剂15 %哒·阿维热雾剂和15 %克螨特热雾剂进行对比试验,现将试验结果报道如下。
1 材料与方法
1.1 参试药剂
15 %哒·阿维热雾剂和15 %克螨特热雾剂均由海南大学环境与植物保护学院提供。
热雾机为6HY-25型背负式弯管热雾机(南通广益机电有限公司生产),所用喷嘴喷孔直径为1.8 mm。……
